B3311331313231311331322331333132313231323331333131333132313223311231   >>    B331133131323131133132233133313231323132333133313133313231322331123   <<    B3311331313231311331322331333132313231323331333131333132313223311233   >>      B3311331313231311331322331333132313231323331333131333132313223311232   >>